92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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//
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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
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// Copyright 2008-2016 National ICT Australia (NICTA)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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//! \addtogroup mp_misc
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//! @{
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template<typename eT, const bool use_smaller_thresh = false>
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struct mp_gate
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{
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arma_inline
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static
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bool
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eval(const uword n_elem)
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{
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#if defined(ARMA_USE_OPENMP)
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{
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const bool length_ok = (is_cx<eT>::yes || use_smaller_thresh) ? (n_elem >= (arma_config::mp_threshold/uword(2))) : (n_elem >= arma_config::mp_threshold);
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if(length_ok)
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{
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if(omp_in_parallel()) { return false; }
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}
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return length_ok;
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}
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#else
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{
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arma_ignore(n_elem);
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return false;
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}
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#endif
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}
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};
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struct mp_thread_limit
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{
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arma_inline
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static
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int
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get()
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{
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#if defined(ARMA_USE_OPENMP)
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int n_threads = (std::min)(int(arma_config::mp_threads), int((std::max)(int(1), int(omp_get_max_threads()))));
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#else
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int n_threads = int(1);
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#endif
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return n_threads;
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}
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arma_inline
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static
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bool
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in_parallel()
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{
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#if defined(ARMA_USE_OPENMP)
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{
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return bool(omp_in_parallel());
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}
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#else
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{
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return false;
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}
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#endif
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}
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};
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//! @}
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